I was very keen to get one too, but watched a test of the Lumu's color temp functions by PhotoJoseph on YouTube and it was pretty far off. Lumu responded that they would be able to correct this in app updates, that the hardware was sound. Did you guys test the unit for accuracy? Like comparing it to a grey card reading in Lightroom or PS or Premiere Pro?
Here are the videos I watched.
First Look: Lumu Power Color Temperature and Light Meter for iPhone — Photo Moment 2017-05-30
https://www.youtube.com/watch?v=9G9Hm69tkd4

Product Review: Revisiting the Lumu Power Color Temp & Light Meter for iPhone—PhotoMoment 2017-06-09
https://www.youtube.com/watch?v=7uxvxRMotBE

Very good info. Cut straight to the meat and bones.

I think the jitter looks like the camera's autofocus. It looks like the same jitter in the autofocus vid below it.

I actually got to play with this for an Adorama review. I spoke with the Sony rep. Some other info, which I forgot to mention in my review, is that the S-Log now starts at 800 ISO. Also the rolling shutter is supposed to be completely gone. I was using a preproduction model and couldn't record to card so I couldn't check it, but I'd be surprised if it's not true.

I'm excited for this camera. I asked about the a7s mark ii and he didn't know/couldn't tell me.

Also, the autofocus with a metabones adapter and canon glass was very fast.